RE: "Something moved...and he fired."
Thats terrible. I have an 11 y/o daughter and can't imagine how I would feel if something happened to her, especially in a situation such as this one. Sounds like a lack of adult supervision or hunting safety training. I took my daughter hunting with me once this year and I was constantly telling her about safety. I dont know how many times I had to tell her to walk behind me or next to me.
Y'all keep a close eye on your kids and drill safety,safety,safety into their heads.
Steve